<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input v-model="name" type="text" />
    </div>
    <div>
      <span>年龄:</span>
      <input v-model="age" type="number" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="gender">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="add">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in arr" :key="index">
          <td>{{ index + 1 }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.gender }}</td>
          <td>
            <button @click="del(index)">删除</button>
            <button @click="edit(index)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      arr: [
        {
          name: "赵磊",
          age: 18,
          gender: "男",
        },
      ],
      name: "",
      age: "",
      gender: "男",
      flag: false,
      id: "",
    };
  },
  methods: {
    add() {
      if (this.name.length === 0 || this.age.length === 0)
        return alert("请输入数据");
      if (this.flag) {
        this.arr[this.id].name = this.name;
        this.arr[this.id].age = this.age;
        this.arr[this.id].gender = this.gender;
        this.flag = false;
      } else {
        this.arr.push({
          name: this.name,
          age: this.age,
          gender: this.gender,
        });
      }
      this.name = "";
      this.age = "";
      this.gender = "男";
    },
    del(index) {
      this.arr.splice(index, 1);
    },
    edit(index) {
      this.name = this.arr[index].name;
      this.age = this.arr[index].age;
      this.gender = this.arr[index].gender;
      this.flag = true;
      this.id = index;
    },
  },
};
</script>
